TY  - BOOK
AU  - Rai,B
TI  - Improve your science : std. 1 coursebook ( with answers) 
SN  - Improve Your Science Series.
U1  - 507.13 RAI 
PY  - 2011///
CY  - Nairobi 
PB  -  Dhillon Publishers
KW  - Science, study and teaching
ER  -